在ASP.NET中使用Response.ContentType="类型名";来确定输出格式

application/activemessage
application/andrew-inset
application/applefile
application/atomicmail
application/dca-rft
application/dec-dx
application/mac-binhex40 hqx
application/mac-compactpro cpt
application/macwriteii
application/msword doc
application/news-message-id
application/news-transmission
application/octet-stream bin dms lha lzh exe class
application/jsp jsp
application/oda oda
application/pdf pdf
application/postscript ai eps ps
application/powerpoint ppt
application/remote-printing
application/rtf rtf
application/slate
application/wita
application/wordperfect5.1
application/x-bcpio bcpio
application/x-cdlink vcd
application/x-compress Z
application/x-cpio cpio
application/x-csh csh
application/x-director dcr dir dxr
application/x-dvi dvi
application/x-gtar gtar
application/x-gzip gz
application/x-hdf hdf
application/x-httpd-cgi cgi
application/x-java-jnlp-file jnlp
application/x-koan skp skd skt skm
application/x-latex latex
application/x-mif mif
application/x-netcdf nc cdf
application/x-sh sh
application/x-shar shar
application/x-stuffit sit
application/x-sv4cpio sv4cpio
application/x-sv4crc sv4crc
application/x-tar tar
application/x-tcl tcl
application/x-tex tex
application/x-texinfo texinfo texi
application/x-troff t tr roff
application/x-troff-man man
application/x-troff-me me
application/x-troff-ms ms
application/x-ustar ustar
application/x-wais-source src
text/xml XML ent cat sty
text/dtd dtd
text/xsl xsl
application/jsp jsp
application/zip zip
audio/basic au snd
audio/mpeg mpga mp2
audio/x-aiff aif aiff aifc
audio/x-pn-realaudio ram
audio/x-pn-realaudio-plugin rpm
audio/x-realaudio ra
audio/x-wav wav
chemical/x-pdb pdb xyz
image/gif gif
image/ief ief
image/jpeg jpeg jpg jpe
image/png png
image/tiff tiff tif
image/x-cmu-raster ras
image/x-portable-anymap pnm
image/x-portable-bitmap pbm
image/x-portable-graymap pgm
image/x-portable-pixmap ppm
image/x-rgb rgb
image/x-xbitmap xbm
image/x-xpixmap xpm
image/x-xwindowdump xwd
message/external-body
message/news
message/partial
message/rfc822
multipart/alternative
multipart/appledouble
multipart/digest
multipart/mixed
multipart/parallel
text/html html htm
text/plain txt
text/richtext rtx
text/tab-separated-values tsv
text/x-setext etx
text/x-sgml sgml sgm
video/mpeg mpeg mpg mpe
video/quicktime qt mov
video/x-msvideo avi
video/x-sgi-movie movie
x-conference/x-cooltalk ice
x-world/x-vrml wrl vrml
text/vnd.wap.wml wml
application/vnd.wap.wmlc wmlc
text/vnd.wap.wmlscript wmls
application/vnd.wap.wmlscriptc wmlsc
image/vnd.wap.wbmp wbmp
text/css css
text/vnd.sun.j2me.app-descriptor jad
application/java-archive jar
video/3gp 3gp
video/3gpp mp4